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<h1>examples/features/features.cpp</h1><a href="features_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> *      Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012. PARP Research Group.</span>
<a name="l00003"></a>00003 <span class="comment"> *      &lt;http://perception.inf.um.es&gt;</span>
<a name="l00004"></a>00004 <span class="comment"> *      University of Murcia, Spain.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> *      This file is part of the QVision library.</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> *      QVision is free software: you can redistribute it and/or modify</span>
<a name="l00009"></a>00009 <span class="comment"> *      it under the terms of the GNU Lesser General Public License as</span>
<a name="l00010"></a>00010 <span class="comment"> *      published by the Free Software Foundation, version 3 of the License.</span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> *      QVision is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> *      but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<a name="l00015"></a>00015 <span class="comment"> *      GNU Lesser General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> *      You should have received a copy of the GNU Lesser General Public</span>
<a name="l00018"></a>00018 <span class="comment"> *      License along with QVision. If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020 
<a name="l00044"></a>00044 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
<a name="l00045"></a>00045 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
<a name="l00046"></a>00046 <span class="preprocessor">#include &lt;iostream&gt;</span>
<a name="l00047"></a>00047 <span class="preprocessor">#include &lt;QDebug&gt;</span>
<a name="l00048"></a>00048 
<a name="l00049"></a>00049 <span class="preprocessor">#include &lt;qvip.h&gt;</span>
<a name="l00050"></a>00050 
<a name="l00051"></a>00051 <span class="preprocessor">#include &lt;QVApplication&gt;</span>
<a name="l00052"></a>00052 <span class="preprocessor">#include &lt;QVVideoReaderBlock&gt;</span>
<a name="l00053"></a>00053 <span class="preprocessor">#include &lt;QVDefaultGUI&gt;</span>
<a name="l00054"></a>00054 <span class="preprocessor">#include &lt;QVImageCanvas&gt;</span>
<a name="l00055"></a>00055 <span class="preprocessor">#include &lt;QVPolyline&gt;</span>
<a name="l00056"></a>00056 <span class="preprocessor">#include &lt;QVHarrisPointDetector&gt;</span>
<a name="l00057"></a>00057 <span class="preprocessor">#include &lt;QVCannyEdgeDetector&gt;</span>
<a name="l00058"></a>00058 <span class="preprocessor">#include &lt;QVMSERDetector&gt;</span>
<a name="l00059"></a>00059 <span class="preprocessor">#include &lt;QVNumericPlot&gt;</span>
<a name="l00060"></a>00060 <span class="preprocessor">#include &lt;QVHistogramPlot&gt;</span>
<a name="l00061"></a>00061 
<a name="l00062"></a>00062 <span class="preprocessor">#ifndef DOXYGEN_IGNORE_THIS</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span>
<a name="l00064"></a>00064 <span class="keyword">class </span>ContourExtractorBlock: <span class="keyword">public</span> <a class="code" href="classQVProcessingBlock.html" title="Base class for Block threads.">QVProcessingBlock</a>
<a name="l00065"></a>00065         {
<a name="l00066"></a>00066         <span class="keyword">public</span>:
<a name="l00067"></a>00067                 ContourExtractorBlock(QString name = QString()): <a class="code" href="classQVProcessingBlock.html" title="Base class for Block threads.">QVProcessingBlock</a>(name)
<a name="l00068"></a>00068                         {
<a name="l00069"></a>00069                         addProperty&lt;int&gt;(<span class="stringliteral">&quot;Threshold&quot;</span>, inputFlag,        128, <span class="stringliteral">&quot;Threshold for a point to count as pertaining to a region&quot;</span>, 0, 255);
<a name="l00070"></a>00070                         addProperty&lt;int&gt;(<span class="stringliteral">&quot;MinAreaIPE&quot;</span>, inputFlag,       0, <span class="stringliteral">&quot;Minimal area to keep points in the IPE algorithm&quot;</span>, 0, 50);
<a name="l00071"></a>00071                         addProperty&lt; QVImage&lt;uChar,3&gt; &gt;(<span class="stringliteral">&quot;Input image&quot;</span>, inputFlag|outputFlag);
<a name="l00072"></a>00072                         addProperty&lt; QList&lt;QVPolyline&gt; &gt;(<span class="stringliteral">&quot;Internal contours&quot;</span>, outputFlag);
<a name="l00073"></a>00073                         addProperty&lt; QList&lt;QVPolyline&gt; &gt;(<span class="stringliteral">&quot;External contours&quot;</span>, outputFlag);
<a name="l00074"></a>00074                         }
<a name="l00075"></a>00075 
<a name="l00076"></a>00076                 <span class="keywordtype">void</span> <a class="code" href="classQVProcessingBlock.html#a0283c799776e0c938538de0b0ae6b463" title="Function to be defined in subclasses with processing code.">iterate</a>()
<a name="l00077"></a>00077                         {
<a name="l00078"></a>00078                         <span class="comment">// 0. Read input parameters</span>
<a name="l00079"></a>00079                         <span class="keyword">const</span> <a class="code" href="classQVImage.html">QVImage&lt;uChar,1&gt;</a> image = getPropertyValue&lt; QVImage&lt;uChar,3&gt; &gt;(<span class="stringliteral">&quot;Input image&quot;</span>);
<a name="l00080"></a>00080                         <span class="keyword">const</span> uInt      rows = image.<a class="code" href="classQVImage.html#a55e71ad628f450ee82bb4226cb62ec17" title="Overloaded function from QVGenericImage::getRows().">getRows</a>(), cols = image.<a class="code" href="classQVImage.html#ad0f2758702ee4d96d538aa353ae81bb7" title="Overloaded function from QVGenericImage::getCols().">getCols</a>(),
<a name="l00081"></a>00081                                         threshold = getPropertyValue&lt; int &gt;(<span class="stringliteral">&quot;Threshold&quot;</span>),
<a name="l00082"></a>00082                                         minAreaIPE = getPropertyValue&lt; int &gt;(<span class="stringliteral">&quot;MinAreaIPE&quot;</span>);
<a name="l00083"></a>00083 
<a name="l00084"></a>00084                         <a class="code" href="classQVProcessingBlock.html#a61f390e8790a77175a6d6e1049a9d127" title="Stablish a performance breakpoint in the execution of the block.">timeFlag</a>(<span class="stringliteral">&quot;Read input parameters&quot;</span>);
<a name="l00085"></a>00085                 
<a name="l00086"></a>00086                         <span class="comment">// 1. Get contours from image</span>
<a name="l00087"></a>00087                         <span class="keyword">const</span> QList&lt;QVPolyline&gt; contours = <a class="code" href="group__qvip.html#gacfe3100b9457c7fe9965a0b0e937ba24" title="Obtains the borders of connected sets of pixels, containing gray-scale values equal...">getConnectedSetBorderContoursThreshold</a>(image, threshold);
<a name="l00088"></a>00088                         <a class="code" href="classQVProcessingBlock.html#a61f390e8790a77175a6d6e1049a9d127" title="Stablish a performance breakpoint in the execution of the block.">timeFlag</a>(<span class="stringliteral">&quot;Get contours from image&quot;</span>);
<a name="l00089"></a>00089 
<a name="l00090"></a>00090                         <span class="comment">// 2. Apply IPE</span>
<a name="l00091"></a>00091                         QList&lt;QVPolyline&gt; ipeContours;
<a name="l00092"></a>00092 
<a name="l00093"></a>00093                         <span class="keywordflow">foreach</span>(<a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> polyline, contours)
<a name="l00094"></a>00094                                 {
<a name="l00095"></a>00095                                 <a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> ipePolyline;
<a name="l00096"></a>00096                                 <a class="code" href="group__qvip.html#ga69b4cc8c2c9561eb4623cb86ddd16fff" title="Eliminates points of a polyline of small shape contribution using the IPE algorithmThis...">IterativePointElimination</a>(polyline, ipePolyline, minAreaIPE);
<a name="l00097"></a>00097                                 <span class="keywordflow">if</span> (ipePolyline.size() &gt; 0)
<a name="l00098"></a>00098                                         ipeContours.append(ipePolyline);
<a name="l00099"></a>00099                                 }
<a name="l00100"></a>00100 
<a name="l00101"></a>00101                         <a class="code" href="classQVProcessingBlock.html#a61f390e8790a77175a6d6e1049a9d127" title="Stablish a performance breakpoint in the execution of the block.">timeFlag</a>(<span class="stringliteral">&quot;IPE filtering&quot;</span>);
<a name="l00102"></a>00102 
<a name="l00103"></a>00103                         <span class="comment">// 3. Export contours to output property</span>
<a name="l00104"></a>00104                         QList&lt;QVPolyline&gt; internalContours, externalContours;
<a name="l00105"></a>00105 
<a name="l00106"></a>00106                         <span class="keywordflow">foreach</span>(<a class="code" href="classQVPolyline.html" title="Polyline representation.">QVPolyline</a> polyline, ipeContours)
<a name="l00107"></a>00107                                 <span class="keywordflow">if</span> (polyline.direction)
<a name="l00108"></a>00108                                         internalContours.append(polyline);
<a name="l00109"></a>00109                                 <span class="keywordflow">else</span>
<a name="l00110"></a>00110                                         externalContours.append(polyline);
<a name="l00111"></a>00111 
<a name="l00112"></a>00112                         setPropertyValue&lt; QList&lt; QVPolyline&gt; &gt;(<span class="stringliteral">&quot;Internal contours&quot;</span>,internalContours);
<a name="l00113"></a>00113                         setPropertyValue&lt; QList&lt; QVPolyline&gt; &gt;(<span class="stringliteral">&quot;External contours&quot;</span>,externalContours);
<a name="l00114"></a>00114                         <a class="code" href="classQVProcessingBlock.html#a61f390e8790a77175a6d6e1049a9d127" title="Stablish a performance breakpoint in the execution of the block.">timeFlag</a>(<span class="stringliteral">&quot;Computed output contours&quot;</span>);
<a name="l00115"></a>00115                         }
<a name="l00116"></a>00116         };
<a name="l00117"></a>00117 
<a name="l00118"></a>00118 <span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])
<a name="l00119"></a>00119         {
<a name="l00120"></a>00120         ippSetNumThreads(1);
<a name="l00121"></a>00121 
<a name="l00122"></a>00122         <a class="code" href="classQVApplication.html" title="Main class for QVision applications.">QVApplication</a> app(argc, argv,
<a name="l00123"></a>00123                 <span class="stringliteral">&quot;Example program for QVision library. Obtains several features from input video frames.&quot;</span>
<a name="l00124"></a>00124                 );
<a name="l00125"></a>00125 
<a name="l00126"></a>00126         ContourExtractorBlock contoursBlock(<span class="stringliteral">&quot;Contours Extractor Block&quot;</span>);
<a name="l00127"></a>00127         <a class="code" href="classQVCannyEdgeDetector.html">QVCannyEdgeDetector</a> cannyBlock(<span class="stringliteral">&quot;Canny Operator Block&quot;</span>);
<a name="l00128"></a>00128         <a class="code" href="classQVHarrisPointDetector.html">QVHarrisPointDetector</a> cornersBlock(<span class="stringliteral">&quot;Harris Block&quot;</span>);
<a name="l00129"></a>00129         <a class="code" href="classQVMSERDetector.html">QVMSERDetector</a> mserBlock(<span class="stringliteral">&quot;MSER Block&quot;</span>);
<a name="l00130"></a>00130 
<a name="l00131"></a>00131         <a class="code" href="classQVVideoReaderBlock.html" title="This is a generic video input processing block for the QVision architecture.">QVVideoReaderBlock</a> videoReader(<span class="stringliteral">&quot;Video reader&quot;</span>);
<a name="l00132"></a>00132 
<a name="l00133"></a>00133         videoReader.linkProperty(&amp;contoursBlock,<span class="stringliteral">&quot;Input image&quot;</span>);
<a name="l00134"></a>00134         videoReader.linkProperty(&amp;cannyBlock,<span class="stringliteral">&quot;Input image&quot;</span>);
<a name="l00135"></a>00135         videoReader.linkProperty(&amp;cornersBlock,<span class="stringliteral">&quot;Input image&quot;</span>);
<a name="l00136"></a>00136         videoReader.linkProperty(&amp;mserBlock,<span class="stringliteral">&quot;Input image&quot;</span>);
<a name="l00137"></a>00137 
<a name="l00138"></a>00138         <a class="code" href="classQVDefaultGUI.html" title="Main user interface widget for QVision applications.">QVDefaultGUI</a> interface;
<a name="l00139"></a>00139 
<a name="l00140"></a>00140         <a class="code" href="classQVImageCanvas.html" title="Display widget for QVImage objects and other data types.">QVImageCanvas</a> contourCanvas(<span class="stringliteral">&quot;Contours&quot;</span>);
<a name="l00141"></a>00141         contoursBlock.linkProperty(<span class="stringliteral">&quot;Input image&quot;</span>, contourCanvas);
<a name="l00142"></a>00142         contoursBlock.linkProperty(<span class="stringliteral">&quot;Internal contours&quot;</span>, contourCanvas);
<a name="l00143"></a>00143         contoursBlock.linkProperty(<span class="stringliteral">&quot;External contours&quot;</span>, contourCanvas);
<a name="l00144"></a>00144         contourCanvas.setPropertyValue&lt;QColor&gt;(<span class="stringliteral">&quot;Color for External contours&quot;</span>, Qt::blue);
<a name="l00145"></a>00145 
<a name="l00146"></a>00146         <a class="code" href="classQVImageCanvas.html" title="Display widget for QVImage objects and other data types.">QVImageCanvas</a> cannyCanvas(<span class="stringliteral">&quot;Canny&quot;</span>);
<a name="l00147"></a>00147         cannyBlock.linkProperty(<span class="stringliteral">&quot;Output image&quot;</span>, cannyCanvas);
<a name="l00148"></a>00148 
<a name="l00149"></a>00149         <a class="code" href="classQVImageCanvas.html" title="Display widget for QVImage objects and other data types.">QVImageCanvas</a> cornersCanvas(<span class="stringliteral">&quot;Harris corners displayer&quot;</span>);
<a name="l00150"></a>00150         cornersBlock.linkProperty(<span class="stringliteral">&quot;Input image&quot;</span>, cornersCanvas);
<a name="l00151"></a>00151         cornersBlock.linkProperty(<span class="stringliteral">&quot;Feature locations&quot;</span>, cornersCanvas);
<a name="l00152"></a>00152 
<a name="l00153"></a>00153         <a class="code" href="classQVImageCanvas.html" title="Display widget for QVImage objects and other data types.">QVImageCanvas</a> mserCanvas(<span class="stringliteral">&quot;MSER Regions displayer&quot;</span>);
<a name="l00154"></a>00154         mserBlock.linkProperty(<span class="stringliteral">&quot;Input image&quot;</span>, mserCanvas);
<a name="l00155"></a>00155         mserBlock.linkProperty(<span class="stringliteral">&quot;MSER contours&quot;</span>, mserCanvas);
<a name="l00156"></a>00156         <span class="keywordflow">return</span> app.exec();
<a name="l00157"></a>00157         }
<a name="l00158"></a>00158 
<a name="l00159"></a>00159 <span class="preprocessor">#endif</span>
</pre></div></div>
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<center><a href="http://perception.inf.um.es/QVision">QVision framework</a>.
<a href="http://perception.inf.um.es">PARP research group</a>.
Copyright &copy; 2007, 2008, 2009, 2010, 2011.</center>
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